Three posters cost $9.60. at that rate, how many posters can you buy for $48?
a) 5 posters
b) 15 posters
c) 16 posters
d) 13 posters
e) 12 posters

15 posters is the correct answer

Step-by-step explanation:

Divide 9.60 by 3.

That would make each poster cost 3.20.

now divide 48 by 3.20 and that will tell you how many posters you can get for 48 dollars.

15 posters

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

well we know there are 4 clubs in 52 cards so it’s replaced so it should be 3/51

step-by-step explanation: